Question

is the additive identity of rational numbers.

• A. 1
• B. 0.0
• C. -1
• D. $\frac{1}{2}$

Answer 1

The correct option is B 0.0

Zero is the additive identity of rational numbers.
For any rational number, the additive identity is that number, which when added to the rational number, gives the same number as the sum.
When zero is added to any rational number $\frac{p}{q}$, the result is the same number $\frac{p}{q}$.
i.e., $\frac{p}{q}+0=\frac{p}{q}$
Hence, zero is the additive identity for any rational number.